To Play DOOM on JS-DOS visit https://thedoggybrad.github.io/doom_on_js-dos/ then do the following:
1.) Click the button named "Click to start" then wait for the game to load.
2.) After loading press any of the move keys indicated on the Game Controls section.
3.) The game menu should appear then navigate using the move keys indicated on the Game Controls section.
4.) Enjoy!
Move: UP, DOWN, LEFT, RIGHT
Use: W
Fire: S
Speed on: SPACE
Strafe on: ALT
Strafe: A, D
Change Weapon: 1, 2, 3, 4, 5, 6, 7